Re: Muzzle brake question and a grain of salt.
Wild Bill hit the nail on the head.
Sometimes it will change the barrel for the better or the worst. You just never know. The good news is, if it changes for the worst, you just need to redevelop your loads. Differant powers, bullets, charge weights ect....
The act alone of installing a brake can cause unpredictable accuracy changes however, the tamer the beast, the better the man behind the rifle can shoot it. In that sense it may make the overall system more accurate.
Long range shooting is a process that ends with a result. Once you start to focus on the result (where the shot goes, how big the group is, what your buck will score, what your match score is, what place you are in...) then you loose the capacity to focus on the process.